<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../js/vue.js"></script>
</head>

<body>
    <div id="root">
        <h2>今天天气很{{info}}</h2>
        <!-- <button @click="changeWeather">切换天气</button> -->
        <button @click="isHost=!isHost">切换天气</button>
    </div>

</body>

</html>
<script>
    new Vue({
        el: '#root',
        data: {
            isHost: true
        },
        computed: {
            info() {
                return this.isHost ? '炎热' : '凉爽'
            }
        },
        methods: {
            // changeWeather() {
            //     this.isHost = !this.isHost
            // }
        },
    })

</script>